Dry-kiln.



H. HUNTER.

DRY KILN.

APPLICATION FILED JULY 23,1912.

1,043,235, Patented NOV.5,1912.

fir'r yl a' far, 7 /Z% %.%r7/

- wwwvbo z of the water.

pass closely over and be humified by theuseful Dry-Kiln,

HARRY HUNTER, OF INDIANAPOLIS, INDlIANA.

DRY-KILN.

Specification of Letters Patent. Application filed July 23, 1912- Serial No. 711,142.

Patented Nov. 5, i912.

To all whom it may concern: Be it known that I, HARRY HUNTER, a citizen of the United States, residing Indianapolis, in the county of Marion and State of Indiana, have-invented a new and of which the following is. a specification. I v

Theobject of my invention is'to produce a dry kiln' in which freshly varnished arti cles, freshly glued articles,-- etc., may be hardened at a rate more rapidly-than is possible-by'ordinar'y means without injury to the articles.

ghe accompanying drawings illustrate my invention. w

Figure 1 is a vertical! transverse section of a kiln constructed in accordance with my invention; Fig. 2 a yertical longitudinal section oi the same; and Fig-13a horizontal section partly in plan.

In the drawings, 10 indicates a substantially closed. room or compartment preferably properly heat insulated and provided with a; door :11.' Within the' compartment 10,-which may be provided with a. raised slatted floor 12 near the bottom, I arrange a transverse "horizontal partition 13 near the top, and a vertical partition 14 near, but spaced from, one side, so as to form an air passage 15 leading downwardly from the air compartment 16 formed in the upper end of compartment 1Q by the partition 13, Arranged within compartment 16 is a heating coil 17 through'which a desirable heating medium, such as steam, may be. circulated. At the lower end of passage 15 is awater pan 18, within which a heating coil* 19 is, mounted so that the water within pan 18 may be brought to any desired temperature so as to increase or diminish vaporization The pan 18, which preferably extends the full length of the compartment 10, is located immediately adjacent the lower end of partitionl so that all air passing "downwardly through 'thepassage 15 must water pan 18 before itcan enter the'drying compartment 20, which is formed by the partitions 13 and 14; Leading from the points as far distantas possible from pan 18, are air discharge pipes 21, 21, which lead upwardly into compartment 16 and thence for a considerable distance on a slight upward slant along compartment 16 before issuing out of chamber 10, the discharge drying chamber 20.

such as veneer work,

pipes being higher than their structure near the lower part thereof, and.

proceeding thence upwardly through chamber 20 and into chamber 16. are air inlet pipes 22, 22, the inner delivery ends of which may be extended for some distance within chamber 16. Conveniently there is one pipe, 22 beside each pipe 21, for equalizing inflow and outflow.

In operation, become highly heated by reason of the heat from coil 17 and, therefore, cause an upward flow of air through the pipes 21 so as to draw the air from/the lower part of the Similarly, the pipes 22 become heated 'so tl air throughsaid pipes into chamber 16, said air, becauseof the suction produced by pipes 21, passing down throughthe passage 15, over the water in pan 18, where, it becomes properly humified, and thence into chamber 20,.

Ithas' long been well known that freshly varnished articles, freshly glued articles, etc, can be very rapidly and successfully hardened by proper application of highly heated and properly humified air, but the perienced in the carrying out of such process the upper ends of pipes21- The pipes 21 all preferably lead rt there is an inflow of difficulty heretofore ex- 4.

has been to obtain a proper circulation of air vwithin the drying chamber and a constant withdrawal of the varnish-fume-ladenem:-

from the chamber fresh air therefor.

Actual tests of my proper supply and circulation ofheated and humified air may be obtained by apparatus and the substitution of ponstructed in accor ance with the above disclosure.

I claim as my invention: 1. A dry kiln consisting of a main chamher having a heating compartment arranged in its upper an air delivery passage leading from said heatingcompartment to the lower part of the drying compartment, a water pan arranged 1n the line of an movement trom.

the heating compartment to the drying compartment, a heating coil for heating the contents of the water apparatus 5 show I that part, a. drying compartment,

pen, a heating coil for hatlngthe heating compartment, an 8.11"

discharge tube leading from the lower 'pa'rt' air delivery passage from the lower part of atmosphere outside, into the lower .part of the drying compartment and thence up-' wardly through the drying compartment and discharging into the heating compartment.

2. A dry kiln consisting of a main chamber having a heating compartment arranged in its upper .part, a drying compartment, an

ing compartment to drying compartment, a water pan arranged in the line of air movement from the'heat ing compartment to the drying compart: ment, a heating coil for heating the heating compartment, an air discharge tube leading the drying compart' ment and thence upwardly and horizontally through a portion of the heating compartment over the heating coil and into the atmosphere outside, and an air inlet passage leading from the atmosphere outside into the lower part of the drying compartment and thence upwardly through the drying compartment and ing compartmen -3. A dry kiln consisting of a main chamber having a heating compartment arranged in its upper part, a drying compartment, an air delivery passage leadingtrom said heating compartment to the lower part of the drying compartment, a water pan arranged in the line of air movement from the heating compartment to the drying compartment, a heating coil for heating the con- Copies of this Qatent may be obtained for five cents each, by addressing th mosphere outside into through the leading from said heat the lower part'of the discharging into the heattents of the water pan, a heating. coilfer heating the heating compartment, an air discharge tube leading through a portion of the heating compartment and into the atmosphere outside, and an air inlet passage leading from the atthe lower part of the drying compartment'and thence upwardly drying compartment 'and discharging into the heatingcompartment;

4; Adry kilnconsisting of a main chamber having a heating compartment arranged in its upper part, a drying compartment, an air delivery'passageleading from said heating compartment to the lower part of the drying compartment, a water pan arranged in the line of air moyement =from the heating compartment tov the' drying compartfrom the lower part of the drying compartment and: thence ment, a heating coil for heating thehheating compartment, an air discharge tube leading from the lower part of the drying compare ment and-thence through a portion of the heating compartment and intothe atmosphere outside, and an. air inlet passage leading from the atmosphere outside into the lower part of the drying. compartment and .thence upwardly through the-drying compart-ment and discharging into the heating compartment.

In witness whereof, I, have hereunto set my hand and seal at Indianapolis, Indiana,

this 9th day of July, A. I). one thousand nine hundred and twelve.

HARRY HUNTER. a 8.]

Witnesses:

Josnrnmn GAsrEn, G. B. SGHLEY.

Commissioner of Patents,

Washington, D. C. 

